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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb96c6a79710c93579d02b89f8b4fe8c98956e42f3f7b0f6f38aee8e59bb1cb8' 
  AND token = 'Clh9agda2PMUQJELGV7K85WE/IS6kiyC1c2E83pM3uE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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