SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '962183f81a87a5bc120e709fcbcb21903bcbd26abbf283e0f3dc8107d795b275' 
  AND token = 'pLy+tK2kXw9FUf+GqWOH82/Kag5CwZUD6lV3iJU8ew0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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