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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45f1563fec019fab4b0ef807df9daa6af0fe3dd9e18bb10260777400f46af9eb' 
  AND token = 'z1thEqvHQEL4N9AZj5Lim9fIyiuErWNl+6UAnQ6vaq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}