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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c317a0375c32f7658fa1331765a8bb0f85f7a6c203f1a7cea7e5c1f033985ddc' 
  AND token = '5LdC63lgFiVJ1TTVjKWIDdWETS4e+5/Z8ePJARVj8ZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}