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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '885460663587297bcc7f16fb5a26ef05a9767c0895ec038f6e95c0523e988aed' 
  AND token = 'NL20UrgL0BaWqQIyo0l1zJlR9pZzGhsGonq5CNINSR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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