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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24bb5e5a038c7b6e1870a56d64b3dc6044c9ced37f74c34393a950fae1cc03f3' 
  AND token = 'nMvF2K2oeFbHiaG5WAsRVjfdTgVAgtui6J1RkepZSi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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