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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '099eccb944105a181864744907abec958b9ea4c480b94d5e82efc697797cd51b' 
  AND token = 'VuBeDRrT0neNPj8XF9kEcav0c6HGIf3NCBp6llBnOEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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