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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d9f25352a884ff99c80d6b538c01e446f9460065b047c37f6e21f9366164869' 
  AND token = 'T3nFhdmxstppvnSwlZ78XdKDAo3a40vPj0Vp3bYNT3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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