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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbd4d263358954fbc573738b3460603032583e97761ee99607680082e3a9d4d7' 
  AND token = 'jrzzU4viUnVQAlXa4Azl/WBN394uv8UDzwZww2TP6fQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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