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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae3f1c8b99b9086a30fd9f00676809bef6cd470b817fd930dc8ef29882cb5eff' 
  AND token = '12jdSZO8rxz4l5Mg5pE9YRaayE52J9YAOdJbBlarRgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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