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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee75244e3f6af6cbd333b77ad2dbf209a745a2b14c422afede22fc6459158d47' 
  AND token = 'Rzd/HbeyAXLyWureshvFfZLio1r+knxrm+mHoQNHfQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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