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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'cc0ac43278da556ea05e035f1cde1d9b022407587e2cfa52e8199ce8eff60555' 
  AND token = 'bzb0Rnsr3LEavUM5vnfJcALQK63tZrj7GULR+4xNuEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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