Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42a3f8b8b06fadd28c18355e82814eee4b5fbd72f442e912edf679f0cc6a2043' 
  AND token = 'ZF7BaKK6BISK3K5aiUwP3N9q36H4iJEigZ++FABNylE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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