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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01cada9b88c54e359f782ef4e724f9dd8fab00419cea55136c1c16c57669dc17' 
  AND token = 'K2mDvy3x/11oI3bCfqeB5S0VLpMmC8iSKFB5P4EBRoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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