Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e7360fcd73c773f0b435c698355ff38b51d9224148d8466f5bdeb4365944d33' 
  AND token = 'r+nR6rAolTN5cPoFy02sNbY4ze60zN3KUMS7YClMDoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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