Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e880c5e9f1ca2970f7114b02caa8890757ed837984841b9c259ac163e1f2562b' 
  AND token = 'EBEwFm77FGigYCF9k9dJAhORsPwelA9uc3dzrfo/hEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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