Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08c618831b45de1ed52654a6ffbc96fa66ae4a2e203b22c250471dfa8680e37d' 
  AND token = 'XOOkJlRWYFe1ax2yjA6SSk4vbr0DPx2StWKJLu7Tgcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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