Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd9076e1cb8a86b6c4eda60e8c510e7e3d7e77246383383729323248561af7dd' 
  AND token = 'JEvyKQNHCUYI+PZ0McUoDQXlBmBXpk4hX3STx67pBz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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