Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3da2e1799fc179063ee0c58c915693deff1b606c95134ee58221795f43aa52d2' 
  AND token = 'r7CL+uG4YPw1hR3aM90cStUQvYcfo60sow94LDu24Nw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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