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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64ca3f9d9ec75323618c342a30e2e1e7c7489d45c1e7441f3460c7b9c4464871' 
  AND token = 'w5I6cp1DszUapMUc2ye5cu2wBHLWDH/vuF0Pqvd3Sco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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