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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f01acada4bf905c9123f856860db2ccbd6e694e65946f75b09aa556e5ffaeebc' 
  AND token = 'YqMlLYvBMq4bIpUW/hlzh1Saq/1l8nSAO2X8Kou1KTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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