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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e091c949306f61a31bd06bf7a0db91db3233cdba5652262c0a4aa8c9173f8be' 
  AND token = 'eDn+FuyNm2uu+46upD9jqQT9SEWX8OJXJcOZz1iDNag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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