Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73faec339ff788063691d158a86b5071dac68b9478fa07601b252a00f1a04b69' 
  AND token = '9T12rFnV2qAmU8FpL0QriBfFEyypQbBiFRPlO66+jg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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