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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fd93927076174142981a878d29f454a0e0d685bb89f1a079da2bd0e9a61f34b' 
  AND token = 'BX0ZIg9eFsUeWNetdHbM1fMAnwqs15IpT1Utv4pSojo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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