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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e7cb6bc3070d002f3c5c6437e494c55fa859b7347c70ad8ac9ea2bfb44e0c3d' 
  AND token = '1DECODkUhTBhoHdFucdbXKIMo5VTkXyleARLN+5IeU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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