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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc5949c07df67219ba4b998d98627cb53b00dc86b49cf1b6f69ed970bc496f18' 
  AND token = 'fRY1DecvmU0bYg1lnFxzV9bNJStSPaPpHj8X2UiLEfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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