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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e59bebb7997f0a03f9c25d67320a000333c1ee31518747785b0b24b69950e387' 
  AND token = '7IPV5oLmomiHvbeBqLjuHuonX1zv8+uFfjG1Wwen/Xc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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