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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4536d44f2cb2933bb081c0c7281c8bce67d06a327e64f00c248dd7cab9ad86b0' 
  AND token = '1Po2KmGLrAYyd0+HY5N1GGPJCORrj6tDY2+PxlHfN7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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