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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '307d24f8c1d17b8bf1f6c3f21c6b94ac5ba8b7a8a25708e2fe8f9dc47758670a' 
  AND token = 'Jda9OrKMLiOr/CalrKJnv9XMXna2CYHjh9sYQzic4pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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