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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '486113f270fd539d7abe2a59aeca0fc179b195924de0a763f29e51f9aeb71bd4' 
  AND token = 'xsV9PLYjGP9Jz6+gQkOiabiZ0nEot73As1s/Ajs3Rfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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