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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '080e272ba7a1ca580d0001a7189a0b5c3f5193994a9dae2bc3dddee8b8a8120d' 
  AND token = 'iQ5du80xjXC+IskhKdfS8nTZDcw3R4Crwk6QEnqf6AY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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