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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9250da1f16eef03b35a339bf478e07db7c3aec9b83d2dac1e5af08e7c723229e' 
  AND token = 'acZ8pZQy6b7WsZPxlSnRsA9MveIJkF+YGT1smSiH5Do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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