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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '180389d498e688a0b4cf676b28051c75287d60194acfe076a0116bfa4257f4ae' 
  AND token = 'Hx7hsuDH2oDXvoFQV5Js4jcAbr1coH7908EJxygDJRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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