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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60923441242227527c5652e7800b034a196a6296579ad528a426f1128698089f' 
  AND token = 'V8dX12llw+Qne/0u7pGJvaMYH0dMbGL6xhG8gx4JKos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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