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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8813d52184431e2a8cd1d1209f06a933bc552c51bf59a355b3ffa5fc8c403d0d' 
  AND token = 'NbHW87BDXiR0hbrAyvluO2UBnF1rzuu4qcACA6ZyOjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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