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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0062c4a1e031728f9278650fb7125e8c3949a7df8203f2f4d32cd5ecbb5eb36b' 
  AND token = 'bNLH1aNNui3u3Itb3aHpeIGZDmwR/S8wWRSNXx/vePM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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