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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '065181e59939cd6ae66cda91e3fb4fcf1a109952d29b0b84bddc5584f7188f23' 
  AND token = 'dP4G+G+I8aE3/LTdKlHA1weMmHAocQugmd37zqlFTN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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