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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfd2e9d6b61f5e0fb6d4169c8ff5f9868e28acb6d9070aef0201e0bcbfe7ca1e' 
  AND token = 'OgBBg5oEV3CFswEPC/A5HpQKk84vOoqzXozn6r9dRuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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