Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8ea0d96812d97b3bf472ac1e5491ab2e3a57e6a0cd8c6980b07e06f5e72d045' 
  AND token = 'JJoyR+nU1cwalCkA03X+QmBpj5RlpBBIDoskdqt/qPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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