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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1725c933089b1a1170dfb05c130a316390407e0988d1b96f59120dde3cd07020' 
  AND token = 'aVo+O0CfXEUSefcJa08/+9P9OtANPlKmkVq0bXC+3ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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