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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f69af920afbf100cc00bf5d84c7aa70a9d51817d351ec7cb0134bac2e1a57b5f' 
  AND token = 'NvGdvw75an8jHOeFT9gHkcvdsFea4jG+i7/cb/MDVNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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