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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73930c7fee07241f7ff03d9317e0ae23a3a29c1272df1745b9d87cb5d62c2e1e' 
  AND token = 'XT09uq7DhrlGwC12EEJNf/Tp9IBp4OajabpUWIgBSK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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