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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64e72d379ca725cf83000041d4563cfe3876e587a6df2ffa528bd23d8f1079aa' 
  AND token = 'Lpwf8x9hlTSOw3wpftfd+Y7mllJh5c2P4Si5afhJt4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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