SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce2076deac5fe7d1e1bef5c249e2b189dcf03712475361764fb83b815a823a32' 
  AND token = 'QJQO00g76bZnsRlilRtZzVqYPtDeTYOP1GjOGYvrJrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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