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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07beaffa22101a3e1674a3896653d0d696f8601279155fd1b22d4f4c2b3678a5' 
  AND token = '5pOW0Y16zFTU8lg3NAZnTg0e0Q/qxh251p8eZMOTE8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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