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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5dda0d69d6fb09d180d0621a9d0df4c487ab676bf97d589a472bb00016825b9d' 
  AND token = 'zuHCv8dob9VhRkvqEHHRQZp1ujpHqWWrHQZpGZsfJpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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