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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '41effe2e3799e8c7275f7874261b05b576e2115f871af0d5978d7e0cf9e856c5' 
  AND token = 'qCaC3ATcSicnHY58kRAr6l5LrOdz8U09G0h/5OOq8Fw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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