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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e51eaf2178c40cd321db92722de7d5e14913b3e56f7b3473bafa7beef87331ee' 
  AND token = 'YFcOyiz0Fc2xVO0RBNCmKi1H3vEBvgLTGgGZgocsMGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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