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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '073d98c28c10830f9f552977dfdb11d85020906f5a2d298c6870cbc538865a0d' 
  AND token = 'vT9pq/D1QCyJIYFMYePLK7AfdIpRzPsKWlTrB1QUp7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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