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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'efd9c66fe8e50e00bff578c67ec249a04aa32f1c9d13a0d5beeb71c57b865f46' 
  AND token = 'a/7o3/hx2Th0h1rmJiYt4iku2sxKbiRN0Na5lyV+uKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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