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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11596f66cbc7a6b00cf273aa8e585044ca8b8a12273d26d7ba72705096ca3600' 
  AND token = '1quukMLXVLFoGskZsOkiUM/41VW1kCC/EAG0hXZ0CfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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