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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a1007dd6cf1bf2b688ca9fdf424b0b53fb3f98783ecb7ca37696dd6c1fd4074' 
  AND token = 'GW72pbf7+vGjQS17oRj/pyvdBcibeBQ/qWxCZxZnCDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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