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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acb6e69c77a9cffa0101828dfc1e5d32d66f6e11020413628af58fb7319c7165' 
  AND token = '8n4Jar6dKINlfD2VsMePA2akNi16wZHpJ7R3Oi3YHWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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