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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdd5f443be29fa148382f98b8c68c20eed8aefdc2ac9008162987f69e4f5ffae' 
  AND token = 'ySCCuUbN1a9Bue+BOu3E3SSRA4OIu7FjfY2Iqzi4zMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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