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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05f6f0704aba1dbb71688c8b137a50e387883d308db7afb39bbbe0da835cd199' 
  AND token = 'zczQuaGICwvNRGz7xAkP5MaKYa6KOer/+6bNo2I342Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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