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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abace44326e5b02a8a1acb461f0ab24f59849d23b30ba4e72f293fad93bca184' 
  AND token = 'xLPzd7I8cINxZ9/lYoU2jZBzDuFJpudM8Ee78gJ5MZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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