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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97dad4fa7c36bb8c4294cbcbc2ad36a4779e4fc05db4156f46b4cc309335f114' 
  AND token = 'e+7RGDdhO2qXl+B+OUfzybjymuOPCdZ6aoRGe3VEtn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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