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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22c74b53e3bce9ade4803916dc55e6ea656fee822bcb9a65656cdd5907857962' 
  AND token = '/jMSFQZUKtblN5bXiycWTgBebJ1ij3OlxxdsMSMPXLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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