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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d222071af4da1639079609ec6b7ad6dd2a9bf5ae87067054303edda3b4c947a' 
  AND token = '09+0v35ptB2ae/MWVbDA6x/YJgUM8Ys7F5qVhCiMwec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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