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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c59a8b94ea8dcbfd1a3cb97d4df6188aaef21121b3eeedb6902983a1ac5e3aed' 
  AND token = 'K3baGO5rWP8ETNsmp4zG7nXGCuxRsidKSEUQiM6hdJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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