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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0efa378750e2a2dae9ba2db4b1720887f1a55e32781f25c497db192ee5f25297' 
  AND token = 'wILbGbA6Hx3ijtKXyADa1ZtsQxUZI8aYOPh5cJ+dZ5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}