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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '59104546ff5f217d3e2438487768af8ebc0478440f2990e41c5f9ee6a5d90bab' 
  AND token = 'H/EpOKUucSTN10in+rQ3lrtqKLhgcnFEkrQ3smLSmDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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