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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4f87e9a796108d8c61623df14528e5371de3d9ce340c6a6ad8d0727779161b07' 
  AND token = 'ZGLAOIGH1p4cKnlenw0rYGzPdrHBDcd0qI3SHgllF4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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